Fig. 6.

Structure–function model of the subsystem hierarchy associated with upper-level FB2 subsystem, SS1.2 (shown in Figs. 2C and 4 and Dataset S4 C, E, and H), complementary to and following the similar analysis of SS1.1 in Fig. 5. SS1.2 (and its mirror image SS2.2) has 26 lowest-level subsystems, and overall, current evidence suggests it is primarily associated with the control of innate survival behaviors and their integration with physiologically appropriate visceral (autonomic and neuroendocrine) responses, accompanied by affect. Red abbreviations indicate the most sexually dimorphic regions measured as a difference in coclassification index (see Comparing Female and Male Subsystem Hierarchies and SI Appendix, Fig. S3B; all are in SS1.2 and mirror image SS2.2); bold italic abbreviations with asterisks are part of the sexually dimorphic connections BSTp > AVPV and BSTp > PMd. Abbreviations are in Dataset S1.